SS 904L fasteners are a premium-grade solution designed to withstand aggressive industrial environments. Known for their superior corrosion resistance, especially in strong reducing acids like sulphuric acid, these fasteners are a go-to choice in industries where standard stainless steels fall short. Their high nickel and molybdenum content ensures excellent stress corrosion cracking resistance and pitting resistance making them invaluable in high-stakes applications.
In an industrial setup, SS 904L fasteners play a critical role in ensuring structural integrity and longevity of assemblies. From offshore oil rigs to chemical processing plants, they offer unmatched durability under extreme conditions. These fasteners help reduce maintenance costs and downtime making them a cost-effective solution in the long run.
As a leading SS 904L fasteners manufacturer, we deliver precision-engineered components tailored to client specifications. Our rigorous quality checks, traceable certifications, and adherence to global standards ensure you receive products that perform exceptionally even in the harshest environments. Whether it’s bolts, nuts, washers or threaded rods, we offer a comprehensive range backed by our manufacturing excellence.
Request QuoteWhat are SS 904L Fasteners?
SS 904L fasteners are high-alloy austenitic stainless steel fasteners made using UNS N08904 or DIN 1.4539 material. These fasteners are highly resistant to strong reducing acids, chloride-induced stress corrosion cracking, and crevice corrosion. SS 904L is a non-stabilized low carbon high alloy stainless steel with added copper, which gives it strong resistance to various acids.
Due to their robustness, SS 904L fasteners are widely used in industries such as petrochemicals, pharmaceuticals, seawater equipment, condensers, heat exchangers, and more. Common types include hex bolts, socket head cap screws, stud bolts, heavy hex nuts, spring washers and U-bolts.
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Types of Stainless Steel 904L Fasteners
- SS 904L Structural Bolts
- SS 904L Heavy Hex Bolts
- SS 904L Hex Bolts
- Steel 904L Hexagon Head Bolts
- 904L Stainless Steel Machine Bolts
- Stainless Steel 904L T Bolts
- Stainless Steel 904L Eye Bolt
- 904L SS Foundation Bolts
- Stainless Steel 904L J Bolts
- 904L SS Button Head Bolt
- 904L Stainless Steel Anchor Bolts
- Stainless Steel 904L Long Bolts
- SS 904L Carriage Bolt
- Stainless Steel 904L Elevator Bolt
- Stainless Steel 904L Timber Bolts
- Stainless Steel 904L Square Bolt
- Stainless Steel 904L Metric Bolt
- Stainless Steel 904L Plow Bolts
- Stainless Steel 904L U Bolts
- 904L Stainless Steel Flange Bolts
- Stainless Steel 904L Hex Nuts
- SS 904L Heavy Hex Nuts
- Stainless Steel 904L Wing Nuts
- Stainless Steel 904L Hexagon Nuts
- Stainless Steel 904L Cap Nuts
- 904L SS Square Nuts
- SS 904L Coupling Nuts
- Stainless Steel 904L Hex Jam Nuts
- Stainless Steel 904L T-Nuts
- 904L Stainless Steel Eye Nuts
- Stainless Steel 904L Nylock Nuts
- SS 904L High Tensile Nuts
- 904L Stainless Steel Cage Nuts
- 904L Stainless Steel Dome Nuts
- 904L Stainless Steel Knurled Nuts
- 904L SS Keps-K Lock Nuts
- SS 904L Machine Hex Nuts
- Steel 904L Slotted Nuts
- Stainless Steel 904L Plain Washers
- SS 904L Spring Washers
- SS 904L Locking Washer
- Steel 904L Split Washer
- 904L Stainless Steel Flat Washers
- Stainless Steel 904L Ogee Washers
- Stainless Steel 904L Fender Washer
- SS 904L Conical Washers
- Stainless Steel 904L Serrated Washer
- 904L SS Tab Washers
- Stainless Steel 904L Hex Washer
- SS 904L Countersunk Washer
- 904L SS Dock Washers
- SS 904L Spring Lock Washer
- 904L Stainless Steel Star Washer
- SS 904L Bonded sealing Washer
- Stainless Steel 904L Square Washers
- 904L SS Belleville Washer
- SS 904L Socket Set Screw
- SS 904L Self Drilling Screw
- 904L SS Socket Head Cap Screw
- Steel 904L Hex Head Screws
- Stainless Steel 904L Wood Screw
- Stainless Steel 904L Eye Screw
- Stainless Steel 904L Wing Screw
- SS 904L Self Tapping Screws
- Stainless Steel 904L Roofing Screw
- SS 904L Phillips Head Screw
- Stainless Steel 904L Decking Screw
- 904L Stainless Steel Machine Screw
- Stainless Steel 904L Thumb Screw
- Stainless Steel 904L Drywall Screws
- 904L SS Chipboard Screw
- Stainless Steel 904L Metric Set Screws
- Stainless Steel 904L Sems Screw
- 904L SS Thread Rolling Screw
- SS 904L Full Threaded Stud Bolts
- SS 904L Half Threaded Stud Bolts
- Stainless Steel 904L Threaded Rod
- SS 904L Double Ended Studs
- SS 904L Tap End Stud Bolt
- Stainless Steel 904L Tie Rods
- Stainless Steel 904L Studs
- SS 904L Single End Stud Bolts
- SS 904L Reduced Shank Stud Bolt
- 904L Continuous Threaded Stud Bolt
- SS 904L Partial Threads Stud Bolt
- Stainless 904L Heavy Stud Bolts
SS 904L Fasteners Specification
Before selecting SS 904L fasteners, it's essential to understand their specifications. These specs guide engineers and procurement managers in choosing the right components for pressure-handling and corrosive applications.
| Specifications | Details |
|---|---|
| Material | Stainless Steel 904L (UNS N08904 / WNR 1.4539) |
| Standards | ASTM B649, ASTM A193 / A194, ASTM B625 |
| Types | Bolts, Nuts, Washers, Screws, Threaded Rods |
| Sizes | M6 to M100 (Custom sizes available) |
| Thread Types | Metric, UNC, UNF |
| Finish | Natural, Electro Polished, Passivated |
| Length | Up to 5 meters (threaded rods) |
Equivalent Grades for Stainless Steel 904L Fasteners
SS 904L is recognized globally under different standards. Here's a table listing equivalent international designations:
| Standard | Equivalent Grade |
|---|---|
| UNS | N08904 |
| WNR | 1.4539 |
| EN | X1NiCrMoCu25-20-5 |
| AFNOR | Z2NCDU25-20 |
| ASTM | 904L |
| BS | 904S13 |
904L Stainless Steel Fasteners Sizes
Understanding the range of sizes available for 904L fasteners helps in matching the exact needs of structural, mechanical, and pressure-handling applications. Here's an overview of the typical dimensional offerings:
| Type | Size Range |
|---|---|
| Hex Bolts | M6 – M72 |
| Stud Bolts | M8 – M100 |
| Hex Nuts | M6 – M72 |
| Washers | M3 – M100 |
| Threaded Rods | Up to 5 meters |
| Custom Sizes | As per drawing/spec |
SS 904L Bolt Chemical Composition (1.4539)
The excellent corrosion resistance properties of SS 904L fasteners stem from their unique chemical makeup. Below is the standard chemical composition:
| Element | Content (%) |
|---|---|
| Nickel (Ni) | 23.0 – 28.0 |
| Chromium (Cr) | 19.0 – 23.0 |
| Molybdenum (Mo) | 4.0 – 5.0 |
| Copper (Cu) | 1.0 – 2.0 |
| Carbon (C) | ≤ 0.02 |
| Manganese (Mn) | ≤ 2.0 |
| Silicon (Si) | ≤ 1.0 |
| Iron (Fe) | Balance |
This high-alloy composition improves corrosion resistance in acid-heavy and chloride-rich environments, ideal for chemical and marine industries.
904L Stainless Steel Fasteners Mechanical Properties
To ensure durability and performance, mechanical properties must align with application demands. Below is a chart detailing the mechanical properties of SS 904L fasteners:
| Property | Value |
|---|---|
| Tensile Strength | ≥ 490 MPa |
| Yield Strength (0.2% offset) | ≥ 220 MPa |
| Elongation (in 50mm) | ≥ 35% |
| Hardness, Brinell | ≤ 220 HB |
| Modulus of Elasticity | 195 GPa |
SS 904L Bolt Yield Strength & Physical Properties
SS 904L bolts, nuts, and studs are not just known for their superior corrosion resistance, but also for their stable physical properties under extreme operating conditions. These properties make them highly suitable for chemical processing, power generation, marine and high-temperature industrial applications.
Below is a detailed table highlighting the yield strength and key physical characteristics of SS 904L fasteners:
| Grade | Specific Heat (0–1000°C) (J/kg·K) | Elastic Modulus (GPa) | Density (kg/m³) | Thermal Expansion Coefficient (m/m·°C) | Thermal Conductivity (W/m·K) | Electrical Resistivity (nΩ·m) |
|---|---|---|---|---|---|---|
| 904L | 500 | 200 | 8000 | 13.0 × 10⁻⁶ (0–538°C) | 15.0 (at 500°C) | 850 (at 1000°C) |
SS 904L Hex Bolt Dimensions Table
This table helps you understand the most common size and weight combinations available.
| Bolt Size (mm) | Length (mm) | Thread Type | Weight (kg/100 pcs) |
|---|---|---|---|
| M8 | 25 – 100 | Full / Half | 2.5 – 4.9 |
| M10 | 30 – 120 | Full / Half | 4.1 – 7.8 |
| M16 | 40 – 150 | Full / Half | 8.3 – 16.2 |
| M20 | 50 – 200 | Full / Half | 16.5 – 29.4 |
SS 904L Stud Bolt Size Chart
Get an overview of our most requested sizes for various industrial setups:
| Stud Size (mm) | Length (mm) | Thread Type | Applications |
|---|---|---|---|
| M10 | 50 – 200 | Metric / UNC | Chemical flanges |
| M16 | 75 – 300 | Metric / UNF | Heat exchangers |
| M24 | 100 – 400 | Metric / BSW | Pressure vessels & pipelines |
| M30+ | Custom | On request | Heavy-duty marine applications |
904L Stainless Steel Fasteners Weight Chart
To assist in procurement, shipping, and structural planning, here’s a sample weight chart for SS 904L Fasteners. Actual weights may vary based on length, pitch, and type.
| Fastener Size (mm) | Type | Approx. Weight (kg/100 pcs) |
|---|---|---|
| M8 x 25 | Hex Bolt | 3.1 |
| M12 x 50 | Hex Bolt | 9.2 |
| M16 x 75 | Hex Bolt | 18.3 |
| M20 x 100 | Stud Bolt | 32.4 |
| M24 x 150 | Threaded Rod | 60.0 |
Applications of SS 904L Fasteners
SS 904L Fasteners are engineered for industries where both mechanical integrity and exceptional corrosion resistance are non-negotiable. Whether exposed to harsh chemicals, seawater, or fluctuating thermal loads, SS 904L fasteners deliver long-term performance with minimal maintenance thereby reducing downtime and replacement costs in critical operations.
Their adaptability makes them suitable for a wide range of demanding applications:
- Chemical processing plants
- Pulp and paper processing
- Oil & gas and petrochemical refineries
- Food and beverage industries
- Desalination plants and marine structures
- Heat exchangers and pressure vessels
Your Trusted SS 904L Fasteners Manufacturer & Supplier
As a leading manufacturer and global supplier of SS 904L fasteners, we combine metallurgical expertise with precision engineering to deliver fasteners that meet the highest international standards. Our ISO-certified production facilities are equipped to produce a wide range of fasteners including hex bolts, studs, nuts, and washers tailored to your exact specifications. Whether you require standard sizes or custom configurations, we ensure tight dimensional tolerances, surface finishes, and mechanical properties that align with critical applications across industries. Every product is backed by complete documentation, including Mill Test Certificates (MTCs) and third-party inspection reports upon request. With a robust inventory, prompt dispatch, and export-ready packaging, we serve clients across 30 countries. Choosing us means partnering with a supplier that prioritizes quality, traceability and on-time delivery - no matter the scale or complexity of your project.
Request QuoteFrequently Asked Questions About Stainless Steel 904L Fasteners
Are SS 904L fasteners magnetic?
No, 904L is a non-magnetic austenitic stainless steel in the annealed condition.
Can SS 904L fasteners be used in seawater?
Yes, they are excellent for marine applications due to high resistance to chloride stress corrosion and crevice corrosion.
How does 904L compare to 316L in terms of corrosion resistance?
904L has higher nickel and added copper, making it significantly more resistant to sulfuric acid and chloride-induced corrosion.